Figure 1

Combination index values and fraction of cells affected for three non-small cell lung cancer cell lines exposed to paclitaxel followed by gemcitabine or gemcitabine followed by paclitaxel at 24 hours interval with a total culture time of 48 h. (a) H460, squamous cell carcinoma; (b) H838, adenocarcinoma carcinoma and (c) H520, large cell carcinoma.